You can add presence indication to your website, i.e. it tells people whether your phone is on or not. This works for any phone that can check mail on a automatically.

Procedure:1. Set up a mail server (apt-get install solid-pop3d)2. Create a user on the system and set up your phone to access that mailbox3. Have your website poll a file that the mail server will touch (/var/lib/solid-pop3d/bulletins/)